REMA TIP TOP's No. 221 valve stem garden hose water adapter is used to fill liquid filled Farm, OTR and Agricultural tires. It is designed to screw on to a tire valve and a standard 3/4 inch garden hose which permits fast filling of tires with fluid for ballast. The kit includes extra bushings for standard bore tire valves and older 9251-type valves. There is a button valve on side which releases air displaced by fluid allowing for quick service.